Loose-leaf binder.



0. L. BALDAUP. LOOSE LEAF BINDER. APPLICATION FILED SEPT. 14, 1907.

1,071,500. Patented Aug. 26, 1913.

2 SHEETS-SHEET 1.

TIE 11 wi immeo 3M0 Moi Cl/HFLEj L. BJLfiAl/F j M v ww v a E UNITEDSTATES rarnn CHARLES L. BALDAUEF, OF WEST HOBOKEN, NEW JERSEY, ASSIGNORTO THOMAS NELSON &; SONS, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented Aug. 26,1913.

To all whom it may concern:

Be it known that I, CHARLES LOUIS BAL- DAUF, a citizen of the UnitedStates, residing in the town of West Hoboken, county of Hudson, State ofNew Jersey, have invented new and useful Improvements in Loose-LeafBinders, of which the following is a specification.

My invention relates to a device for binding loose leaves between twoboards in such a manner that any one or more of the leaves may bereadily removed, and others inserted. \Vhile this invention may beapplied to loose-leaf ledgers, or scrap books, or to other similararticles, I have designed it particularly for use in connection with aloose-leaf dictionary, or encyclopedia, which is to be supplied fromtime to time with additional insertion pages of printed matter and fromwhich pages may have to be removed from time to time.

In the drawings, Figure I shows in perspective the preferred form of mynew binder; Fig. II is a sectional view of the same form of binder withpages inserted, the section being made through one of the binding postsshown in Fig. I; Fig. III shows a binder of another form, partially opento permit the insertion or removal of pages; and Fig. IV illustrates thelocking device of the binders shown in Figs. I and III.

In Fig. I a is the front cover or side, and Z) the rear cover of myimproved binder. These covers are preferably made integral with the backportion 0. Bars (Z, 6, preferably made of metal, are attached to therear and front covers a, b respectively (Figs. I and II) by any suitablemeans. The stiffening of the covers is preferably interrupted just infront of the bars in order that the forward. portion of each cover maybe readily opened and closed without affecting the position of the bars.The bar 6 is provided with a plurality of pins or bars f, extendingparallel to the back portion 0. These bars are provided at their freeends with apertures 9 adapted to receive pins or projections 7L carriedby the bar cl.

As shown in Fig. II a number of sheets of paper, such as the printedpages of a book, provided with perforations corresponding in position tothat of the pins or bars f, may he slipped over said pins or bars f, andthe pins or projections k may be slipped into the apertures 9 so as tolock the sheets of paper into place. In order to prevent the pins orprojections h from slipping out of the apertures 9 when the book ishandled, I provide a locking device. This locking device consists of abar 6 preferably integral with the bar 6, and extending at right anglesfrom one end thereof, and bar ct preferably integral with the bar cl andextending at right angles from one end thereof, the bars (Z and 6extending in opposite directions, but lying in parallel planes. By meansof a binding screw 6, inserted in bar 0, and extending through slot clin bar cl I am enabled to lock the bars cl and e, and through them, thebars (Z and e, and the pins f, h, for the purpose described. Such alocking device is preferably provided at both the bottom and the top ofthe book. The head of the binding screw is preferably provided with aslot of suflicient size to enable the screw to be turned with the aid ofa coin. The bars with their locking extensions constitute a framecomprising two oppositely disposed substantially U-shaped members, theirbacks being secured to the inner surfaces of the covers and the arms ofone member slidably engaging with the arms of the other member.

In Fig. I I have shown the slot cl closed at each end. When the bindingscrew is loosened, the back portion 0 falls away from the pins f, intothe position shown in Fig. IV. When the book is to be relocked the backportion 0 is pushed forward until the pins in are in registry with theapertures g, the pins are pushed down into the apertures, and the barse, which have reassumed the position shown in Fig. I, are relocked byaturn of the binding screw. Instead of the pins f, h, I may employchanneled bars f and corresponding fiat bars h, as shown in Fig. III.Moreover instead of the back 0 shown, a telescopic back may be employed,one portion being integral with the front cover a and the other composedof two parts, each united to or integral with the back cover I). Whenthe telescoping back is employed the slot of the locking device is madeopen at its lower end in order to permit the front cover a to be liftedaway, and entirely removed from, the book proper. The locking device isadjustable, as will readily be understood, the range of adjustabilitybeing i in determined by the length of the slot and the Width of theback of the book.

I claim:

In a loose leaf binder, a frame comprising two oppositely disposed,substantially U- shaped members, a leaf holding pin mounted on the baseof one of said members, means on the baseof the other of said membersfor engaging the end of said pin, and means for slidably and pivotallyconnecting the arms of said U-shaped members together and for securingthe members in adjusted position,

whereby said members may be moved away from each other for releasing thepm engaging means and then swung on their pivotal 15 CHARLES L. BALDAUF.

Vitnesses FRITZ V. BRIEsEN, JOHN A. KEHLENBEGK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

